On Dec 3, 2016, at 11:16 AM, Jack McGee <jack at greendesk.net> wrote:
>> Dec 3 08:38:16 amethi upsd[18234]: not listening on ::1 port 3493
> Dec 3 08:38:16 amethi upsd[18234]: listening on 127.0.0.1 port 3493
> Dec 3 08:38:16 amethi upsd[18234]: no listening interface available
I can't say I fully understand the logic behind the IPv6 code, but the first line indicates a problem binding to the IPv6 localhost address. The "LISTEN 127.0.0.1 3493" line in upsd.conf is sufficient for local control and monitoring, and you can remove "LISTEN ::1 3493".